Apple Mac OS X Server (Administrator’s Guide) - Manual (Page 542)

542 Chapter 15
UDP port Used for Reference
7 echo
53 DNS
67 DHCP server (BootP)
68 DHCP client
69 Trivial File Transfer Protocol (TFTP)
111 Remote Procedure Call (RPC)
123 Network Time Protocol
137 Windows Name Service ( WINS)
138 Windows Datagram Service
161 Simple Network Management Protocol (SNMP)
427 SLP (service location)
497 Retrospect
513 who
514 Syslog
554 Real-Time Streaming Protocol (QTSS)
600–1023 Mac OS X RPC-based services (for example, NetInfo)
985 NetInfo (when a shared domain is created using NetInfo
Domain Setup)
2049 Network File System (NFS)
3283 Apple Network Assistant
6970 and up QTSS
7070 Real-Time Streaming Protocol alternate (QTSS)